NMEA 0183 PC OPTO-Isolator Cable, RS232 DB9 Female, Shielded (Isolated to PC) Add isolation to an RS232 port to protect against ground loops. The OPTO-4 provides a safe and low…Continue readingActisense NMEA 0183 PC OPTO-Isolator Cable, RS232 DB9 Female, Shielded (Isolated to PC) [OPTO-4]